'''''The Butterfly Effect''''' is a 2004 American psychological thriller
film written and directed by Eric Bress
and J. Mackye Gruber
, starring Ashton Kutcher
and Amy Smart
. The title refers to the butterfly effect
, a popular hypothetical example of chaos theory
which illustrates how small initial differences may lead to large unforeseen consequences over time.
Kutcher plays 20-year-old college student Evan Treborn,
with Amy Smart as his childhood sweetheart Kayleigh Miller, William Lee Scott
as her sadistic personality disorder|sadistic
brother Tommy, and Elden Henson
as their neighbor Lenny. Evan finds he has the ability to travel back in time to inhabit his former self (that is, his adult mind inhabits his younger body) and to change the present by changing his past behaviors. Having been the victim of several childhood traumas aggravated by stress-induced memory losses, he attempts to set things...